My stock (forget what model it is, but it's got the pistol grip with the shorter 13" LOP) came with a replacement screw. Don't know exactly why I did it, but I ended up just using the stock Remington screw (off of my 870 Express) for it and it worked perfectly. I don't know if this helps you out - but from what I can tell, they seem to be interchangeable...
hsld.